I'm rooted and running Xposed Framework but I've never had any problems with that before. My exchange account is set to sync all mail and use Push delivery but I've used that configuration since I bought the phone and I've never had any issues before.
Is anyone else running rooted NG3 having similar problems?
Over the weekend I installed and rooted the latest software update from AT&T using the method muniz_ri posted. I ended up screwing up my backups so I installed all my apps manually and set up everything from scratch exactly how it was prior to the update. The next day I noticed that Exchange Services was draining my battery showing twice as much usage as Android System or Screen, which are usually my top two. I checked all of my settings and couldn't find anything wrong so I did a factory reset and installed everything from scratch again but the problem is still there.